Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

33502 Products showing for Fuses & Circuit Breakers

252 of 999+
Temporarily out of stock
Siemens 25A Centred Tag Fuse, NH000, 690V ac
  • RS Stock No. 203-1966
  • Mfr. Part No. 3NA3810-6
Each (In a Pack of 3)
PHP3,206.387(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 209-4857
  • Mfr. Part No. 3VA1110-4ED42-0AA0
Each
PHP35,526.33(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Straight Busbar Trunking, 3m, 100A, Canalis KN Series
  • RS Stock No. 211-0433
  • Mfr. Part No. KNT100ED4303
Each
PHP39,452.44(exc. VAT)
In Stock
Littelfuse SMD Non Resettable Fuse 4A, 125V ac/dc
  • RS Stock No. 541-3669P
  • Mfr. Part No. 0452004.MRL
Each (Supplied on a Reel)
PHP55.44(exc. VAT)
Temporarily out of stock
Schneider Electric Masterpact Spare Parts for use with Masterpact MasterPact MTZ2 Circuit Breaker
  • RS Stock No. 654-175
  • Mfr. Part No. LV834036SP
Each
PHP126,691.52(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 25A, Breaking Capacity 65 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-330
  • Mfr. Part No. 3VA5125-6ED21-0AA0
Each
PHP25,427.80(exc. VAT)
In Stock
Eaton 160A NH Fuse, NH0, 500V ac
  • RS Stock No. 181-8809
  • Mfr. Part No. 160NHG0B
Each
PHP618.71(exc. VAT)
In Stock
ABB PS4 4 Phase Busbar, 230 → 400V, 17.5mm Pitch
  • RS Stock No. 225-5982
  • Mfr. Part No. 2CDL240101R1612 PS4/12/16
Each
PHP2,019.18(exc. VAT)
Last RS stock
Schurter PC Board Non Resettable Fuse, Axial 63mA, 125V ac/dc
  • RS Stock No. 167-9225
  • Mfr. Part No. 7010.6300.13
Each (In a Pack of 5)
PHP89.422(exc. VAT)
Temporarily out of stock
SENTRON Wire Connector for use with 3VA55, 3VA65/66 Series
  • RS Stock No. 263-617
  • Mfr. Part No. 3VA9673-0JJ44
1 Kit
PHP35,995.65(exc. VAT)
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 4P 16A, Fixed Mount
  • RS Stock No. 236-6683
  • Mfr. Part No. 1SDA068313R1 XT4S 160 TMD 16A FF
Each
PHP57,993.28(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 250A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 209-5267
  • Mfr. Part No. 3VA5225-6ED31-0AA0
Each
PHP109,530.67(exc. VAT)
Limited stock
ABB 250V ac Push Button Push Button
  • RS Stock No. 701-8499
  • Mfr. Part No. 2CCA703152R0001 E215-16-11D
Each
PHP1,346.04(exc. VAT)
Temporarily out of stock
Better World
Siemens Surge Protector, 9.75kA, Surface Mount Mount
  • RS Stock No. 213-1120
  • Mfr. Part No. 3RT2916-1PA2
Each
PHP5,841.80(exc. VAT)
Currently unavailable
Schurter SMD Non Resettable Fuse 400mA, 277 V ac, 250V dc
  • RS Stock No. 830-4161P
  • Mfr. Part No. 3403.0270.23
Each (Supplied on a Reel)
PHP83.833(exc. VAT)
Temporarily out of stock
Siemens 50A Centred Tag Fuse, NH000, 400V
  • RS Stock No. 230-2963
  • Mfr. Part No. 3NA6820-4
Each (In a Pack of 3)
PHP713.737(exc. VAT)
In Stock
Better World
Siemens Surge Protector, Clip-On Mount
  • RS Stock No. 203-2644
  • Mfr. Part No. 3RT2936-1BD00
Each
PHP1,240.27(exc. VAT)
In Stock
Mersen 350A German Standard Fuse, 31, 700V, 77mm
  • RS Stock No. 304-2300
  • Mfr. Part No. Q300049
Each
PHP12,346.66(exc. VAT)
Temporarily out of stock
nVent ERICO Earth Bar
  • RS Stock No. 277-6235
  • Mfr. Part No. EEB04C506D1A
Each
PHP18,118.35(exc. VAT)
In Stock
Littelfuse 10A Red Blade Car Fuse, 32V dc
  • RS Stock No. 787-4101P
  • Mfr. Part No. 0287010.PXCN
Each (Supplied in a Bag)
PHP18.185(exc. VAT)
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